79565493831 has 32 divisors (see below), whose sum is σ = 112868152320. Its totient is φ = 49753211904.

The previous prime is 79565493827. The next prime is 79565493853. The reversal of 79565493831 is 13839456597.

It is not a de Polignac number, because 79565493831 - 2² = 79565493827 is a prime.

It is a super-2 number, since 2×79565493831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79565493871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 675006 + ... + 784068.

It is an arithmetic number, because the mean of its divisors is an integer number (3527129760).

Almost surely, 2^79565493831 is an apocalyptic number.

79565493831 is a deficient number, since it is larger than the sum of its proper divisors (33302658489).

79565493831 is a wasteful number, since it uses less digits than its factorization.

79565493831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109295.

The product of its digits is 24494400, while the sum is 60.

The spelling of 79565493831 in words is "seventy-nine billion, five hundred sixty-five million, four hundred ninety-three thousand, eight hundred thirty-one".